2021 Audi A5 quattro — Full Specifications
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The 2021 Audi A5 quattro is a coupe powered by a 2L 4-cyl turbo premium gasoline engine. It returns around 32 mpg (UK) / 27 mpg (US EPA) combined. Owners often keep a Audi A5 quattro workshop manual to hand for servicing and repairs.
Compared with the 2020 Audi A5 quattro: Fuel economy is essentially unchanged at around 32 mpg (UK) combined. The engine line-up listed by EPA is unchanged.
Full Specifications
| Engine | 2L 4-cyl turbo |
|---|---|
| Transmission | Automatic (AM-S7) |
| Fuel Type | Premium Gasoline |
| Powertrain | Hybrid |
| Drive | All-Wheel Drive |
| Body Style | Coupe |
| Passenger Volume (EPA) | 84 cu ft (2,379 L) |
| Luggage Volume (EPA) | 11 cu ft (311 L) |
| Fuel Economy (UK) | 32 combined / 29 urban / 37 extra-urban mpg |
| Fuel Economy (US EPA) | 27 combined / 24 city / 31 highway mpg |
| CO₂ Emissions | 206 g/km |
| EPA Greenhouse Gas Score | 6 / 10 (10 = lowest emissions) |
| EPA Est. Annual Fuel Cost | $3,050 (15,000 mi/yr, US prices) |
Engine & Transmission Options
EPA lists 1 configuration for the 2021 Audi A5 quattro, all with the 2L 4-cyl turbo engine. The headline figures at the top of this page describe the most fuel-efficient configuration.
| Engine | Transmission | Drive | MPG (UK) | MPG (US) | CO₂ g/km | Fuel cost / yr |
|---|---|---|---|---|---|---|
| 2L 4-cyl turbo (Hybrid) | Automatic (AM-S7) | All-Wheel Drive | 32 | 27 (24/31) | 206 | $3,050 |
MPG (US) shows combined, with city/highway in brackets. Highlighted row = the configuration used for the headline figures. Source: US EPA fueleconomy.gov.
EPA measures interior passenger volume at 84 cubic feet (about 2,379 litres) and luggage volume at 11 cubic feet (about 311 litres). These are US EPA interior-volume figures; they are measured differently from the boot capacity numbers UK manufacturers quote.
Owner Essentials for the 2021 Audi A5 quattro
Running Costs: 2021 Audi A5 quattro
Covering around 8,000 miles a year in a 2021 Audi A5 quattro at 32 mpg combined, expect roughly 1,136 litres of fuel annually — multiply by your local price per litre for a cost estimate. For US owners, the EPA estimates about $3,050 a year in fuel for the most efficient configuration (15,000 miles, national average prices). Work out exact fuel costs with the fuel cost calculator on 247Calculators.
Convert between MPG and L/100km with the unit converters on 247QuickTools. Not sure what tyre size fits? 247TyreCheck explains tyre sizing.
Only need this car occasionally? See our buy vs rent comparison.
2021 Audi A5 quattro Safety Ratings (NHTSA)
No NHTSA crash-test rating is on record for this model year. The NHTSA rates only a subset of vehicles each year; you can browse every rated vehicle on our NHTSA Safety Ratings hub.
Recalls & Owner Complaints (NHTSA)
NHTSA lists 5 safety recall campaigns that include the 2021 Audi A5 quattro (as of 6 October 2026). Most affected areas: Back over prevention (1), Tires (1), Seat belts (1). A campaign often covers several model years or models, so check your own VIN to see whether your car is affected.
- Back over prevention — campaign 22V742000, reported 5 October 2022. Risk: A blank rearview camera display can reduce the driver's rear visibility, increasing the risk of a crash.
- Tires — campaign 22V034000, reported 26 January 2022. Risk: Rear axle misalignment may cause premature or uneven tire wear, increasing the risk of a crash.
- Seat belts — campaign 21V606000, reported 5 August 2021. Risk: An unsecured child restraint system can increase the risk of injury during a crash.
- Suspension — campaign 21V295000, reported 26 April 2021. Risk: A broken lock nut may misalign the rear axle, causing a loss of control and increasing the risk of a crash.
Showing the 4 most recent of 5 campaigns.
Owners have filed 8 complaints with NHTSA about the 2021 Audi A5 quattro. The most-reported areas are Unspecified (2), Electrical system (2), Engine (1). That is close to the median of 10 complaints across the 12 Audi A5 quattro model years in our data.
Used-buyer checklist for the 2021 Audi A5 quattro
Based on where NHTSA recalls and owner complaints cluster for this model year, these are the areas worth checking before you buy:
- Tyres (1 recall campaign) — Check tyre age and wear and ask about any tyre recalls.
- Seat belts (1 recall campaign) — Check every belt latches and retracts properly and that any restraint recalls were completed.
- Suspension (1 recall campaign) — Listen for knocks over bumps and check tyre wear for signs of alignment problems.
- Electrical system (2 owner complaints) — Test every switch, window, light and warning lamp on a test drive, and ask about battery or alternator replacements.
Source: US NHTSA recall and consumer-complaint databases, retrieved 6 October 2026. Complaints are unverified owner reports, not confirmed defects. Check any vehicle by VIN at nhtsa.gov/recalls, and see our guide to checking a used car for recalls.
How It Compares
How does the Audi A5 quattro compare to similar coupes? For context, coupes in our database average around 25 mpg (UK) combined — this model's 32 mpg figure is 7 mpg better than that average. Its 206 g/km CO₂ figure is 72 g/km lower than the 278 g/km average for coupes on this site. This comparison is based on 1072 coupes in our dataset.
Audi models in our database average about 27 mpg (UK) combined on their most efficient configuration; the 2021 Audi A5 quattro's 32 mpg is 5 mpg above that make average. Its 206 g/km CO₂ figure is 45 g/km lower than the 251 g/km Audi average.
Of the 14 Audi A5 quattro model years we cover, the 2021 is the most economical on its best configuration (32 mpg UK combined). See every Audi A5 quattro year side by side.
Last updated: · Data: US EPA (fueleconomy.gov) and NHTSA safety ratings 18 July 2026; NHTSA recalls and complaints 6 October 2026; Wikidata & curated EU catalogue 18 July 2026; European generation and engine data from Wikipedia 7 October 2026
Vehicle data sourced from manufacturer specifications. Always verify with your vehicle handbook or a qualified mechanic. This is a reference tool, not professional advice.
Recommended Accessories for the 2021 Audi A5 quattro
Frequently Asked Questions
What engine does the 2021 Audi A5 quattro have?
It's fitted with a 2L 4-cyl turbo premium gasoline engine, paired with a automatic (am-s7) transmission.
What is the fuel economy of the 2021 Audi A5 quattro?
The most efficient configuration returns around 32 mpg (UK) combined, or 27 mpg on the US EPA cycle.
How much does the 2021 Audi A5 quattro cost to fuel per year?
The US EPA estimates about $3,050 a year in fuel for the most efficient configuration, based on 15,000 miles of mixed driving and national average fuel prices. Your own cost will depend on mileage and local prices.
Does the 2021 Audi A5 quattro have any recalls?
NHTSA lists 5 safety recall campaigns that include the 2021 Audi A5 quattro (as of 6 October 2026). Most affected areas: Back over prevention (1), Tires (1), Seat belts (1). A campaign often covers several model years or models, so check your own VIN to see whether your car is affected.
What are the most common problems reported for the 2021 Audi A5 quattro?
Among the 8 owner complaints filed with NHTSA, the most-reported areas are Unspecified (2 complaints), Electrical system (2 complaints), Engine (1 complaint). Complaints are unverified owner reports, not confirmed defects, and raw counts rise with how many cars were sold.
How much interior and luggage space does the 2021 Audi A5 quattro have?
EPA measures interior passenger volume at 84 cubic feet (about 2,379 litres) and luggage volume at 11 cubic feet (about 311 litres). These are US EPA interior-volume figures, which are measured differently from the UK boot-capacity numbers manufacturers quote.
Is the Audi A5 quattro's fuel economy good for a coupe?
Yes — it returns around 32 mpg (UK) combined, against a same-body-style average of roughly 25 mpg among the coupes we track, making it one of the more efficient options in its class.